Pocketed bottom for excavating dippers



June 2, 1925.

J. OF. CLARK PDCKE'IED BOTTOM FOR EXCAVATING DIPPERS 1924 2 Sheets-Sheet 1 Filegi June 19 OOOOOOOOOOOOOO 2 Sheets-Shee/kw c" 7 5mm 2 OF. CLARK POCKETED BOTTOMYFOR EXCAVATING DIFPERS Filed June 19, 1924 Ill Patented June 2, 1925.

UNITED STATES PATENT OFFICE.

JOHN 'OFALLON CLARK, OIECHICAGO HEIGHTS, ILLINOIS, ASSIGNOR TO AMERICAN MANGANESE STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

, POCKETED BOTTOM FOR EXCAVATING DIPPERS.

Application filed June 19, 1924. Serial No. 720,895.

To all whom it may concern:

Be it known that I, JOHN OFALLON CLARK, a citizen of the United States, residing at Chicago Heights, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pocketed Bottoms for Excavatin Dippers, ofwhich the following is a specification.

This invention relates to dippers or other like excavating receptacles employed for gathering and removing earth, gravel, or other mineral matter in difi'erent conditions of subdivision, and employing teeth for releasing the material to be gathered sufficiently to permit it to pass into the dipper; and particularly dippers, or the like, which are provided with pocket-like seats or holders in which the teeth are releasably held in order that they can be renewed when worn out.

One object of the present invention is to provide a construction for the front or bottom portion of an excavating dipper which will not only provide pockets or openings into which teeth may be releasably mounted, vbut which will utilize the pocket construction as a strengthening element in the construction of the dipper; to which end, one feature of the invention consists in providingfor the top and bottom walls or confines of the ockets, continuous sections of metal extending from side to side of the dipper in a manner to better enable the dipper to withstand forces which 'it encounters in use, and providing for the lateral confines of the pockets, spacing members between the transverse sections which stand in relation to the latter as strut members in a truss or bridging construction.

' Another object of the invention is to design a dipper or the like with a forward lip or pick-up portion which will be better adapted for efficient stripping operation, in that it will have a substantially flat form as distinguished from the invertedarch form heretofore regarded as indispensable in an implement of this kind designed for heavy duty with rough, coarse material;-to which end, another feature of the invention conpenetrating lip will be placed, respectively,

under tension and compression, by trans- I verse stresses which they encounter in use, and thus sustain each other, notwithstanding the substantially fiat or straight line form' with which they are designed.

Another object of the invention is to pro- 'trussing structure, and also to receive, as a replaceable member, the erosion incident to use at those places in the implement where such depreciation is greatest; and, to these ends, further features of the invention consist in making the forward portion of the lower or outer wall of the trussed excavating lip of a renewable strip fitted to substantially conform with the external lines of the permanent portion of said Well, meeting the latter in a manner to firmlyseat against and be sup orted by it in Withstanding the forces w ich the implement encounters in use, firmly riveted orotherwise held to the trussed structure in a manner to lend its support thereto, and continuing around the corners and a suitable distance up the sides of the body of the implement at the front margin thereof so that it takes thecorner and side wear incident to the scraping of the implement over portions of the material which remain in place during the movement of the dipper or implement.

A further object is to combine with a dipper or other implement having a trussed or pocketed penetrating lip, a special form of tooth, particularly in the intervals between the main penetrating teeth, which special form of tooth is adapted to protect the forward margins of the pocket walls or trussing members from erosion or other destructive influences during the use of the implement; to which end, further features of the invention consist in providing teeth having not only shanks which adapt them for application to a dipper or other excavating implement by insertion into pockets designed to receive them, but havingshoul;

ders, flanges, or other transverse enlargements immediately forward of the ends of the pockets, preferablyseating longitudinally against .said forward edges of the oc'ket walls, but in any event serving as e ective deflectors for the material passing the teeth, and preventing the same from coming in contact with said edges; said shoulder (5 enlargement being designed, in some instances, so that it embraces or surrounds the shank of an adjacent tooth, and, meeting with a similar surrounding and embracing enlargement from the other side of the embraced tooth, forms efi'ective'protection for forwardedges of the pocket in which the latter tooth is mounted; and still another feature of the invention resides in a tooth constructed to function as here stated...

In order that the invention may be fully understood, the preferred thereof, with some modified embodiments of some of its features, will now be described in connection with theaccompanyingdrawin s, in which igure 1 is a side elevation of a ortion of a dipper or other excavating imp ement, generall referredto as the front or bottom of t e implement, such implement being commonly made in sections riveted together.

. Figure 2 is a bottom plan view of the same. y

Figures 3, 4, and 5, are, respectively, a plan view, a side elevation, and an end view of one form of a shouldered or collared tooth intended for use in an implement embodying other features of the present invention, particularly as a form for the teeth that are located intermediately of the main penetrating teeth,

-Fi re 6 is a front view of the dip or .mem er shown in Figures 1 and 2, but with the teeth omitted therefrom.

Fi ure 2. 1

Figure 7 is asection on the line 7--7 of igure 8 is a longitudinal section showing a modified construction.

Figure is a view similar Figure 7, but with a" modified construction of long tggth shank for rendering the tooth adjust- -a e--' I in sections riveted together, such portion being generally referred to as. the front or bottom according to the normal position of the implement when in use, 2 represents excavating teeth with which such. implements are commonly equipped, and 3 represents guard teeth of relatively shorter length generally used intermediately of the excavatembodiment ing teeth for the purpose of displacing such material as may pass between the excavating teeth. i

According to the present invention, the

teeth 2 and 3 are mounted on the member 1' through the medium of pockets 4 constructed of outer and inner walls 5 and 6 andintermediatepartition walls 7 integrally uniting the outer and inner walls in spaced relation, and forming with said outer and inner walls a trussed structure which is very much more eflicient in withstanding transverse stresses, and therefore admits of very' much flatter design of forward lip than where a single thickness of wall is employed,

' besides offering a superior method of releasably mounting the teeth with which the implement is equi ped;' The inner'wall 6-may either merge wlth-the wall 8 of the dipper section,-as shown in Figures 1, 7 and 9, or it may be inwardly ofi'set therefrom, as

shown at 6 in Figure 8, so that the outer wall 5 merges with the wall 8 of the dip-.

per section. Bracing webs 9, or 9 located in rear of'some of the partition walls 7 and integrally uniting the offset portion of the pocket with the dipper wall 8, or 8, may be provided for strengtheningthe union of the trussed digging portionof the implement to the side wall thereof.

In order to prolong the life of the digging portion of the implement and particularly the outer wall 5 or 5* thereof, the forward margin of said outer wall is composed of a replaceable lip 10 seating against the outer wall through the medium of undercut surfaces 11 and held in position by means of rivets 12 which pass through the replaceable lip at suitable intervals, togeth er with the inner wall 6 or 6 and intervening partition -'in the body of the implement; and said side portions 14- may be additionally secured by means of rivets 16 passing through them and through the oflt'sets 17' in the body portion. By this construction, all that portion of the implement which encounters the greatest wear in use is'renderedreplaceable, and the replaceable part is held to the implement very securely.

Teeth 2 may be held against displacement from their ockets 4:. in various ways. According to igure 7, each excavating tooth is provided with an adjustable shank 18 threaded into the tooth so as to change its length, andtheseshanks are passed through openings 19in the rear ends of the-pockets and there secured by jamb nuts 20, 21. With this arrangement, as the teeth 2 become shortened through wear, they may be moved forward and held in various positions in their pockets, thus greatly lengthening the life of a toothwithout sacrificing efficiency by constantly receding worn off parts.

According to Figure 9, excavating teeth 2 are held in their pockets 4; by means of pins 22 passed through the teeth and the inner and outer Walls of the pockets, and there secured by means of cotter pins 23 or other suitable means; and in order that the teeth 2 may be adjusted as they Wear away and keep their penetrating ends approximately in right position, each tooth is provided with a plurality of pin receiving holes 24.

As shown in Figures 1 to 5 inclusive, intermediate guard teeth 3 may be provided with enlargements or shoulders 25 through which they seat-againstand overlie the forward edges of the outer and innerpocketforming walls 5 and 6 as well as the partition wall 7, and these enlargements may be provided with recesses 26 through which they receive and embrace adjacent penetrating teeth 2, the transverse dimension of the enlargement being such that it will embrace about one half the thickness'of the tooth 2 and meet with a similar enlargement of a guard tooth on theopposite side of the penetrating tooth, so that the edges of the pocket walls which receive the penetrating teeth are likewise protected.

If desired, the intermediate teeth with protecting shoulders may be constructed as shown in Figure 12,v where the head 26, of wedge form, has its base designed to pro vide an abutting shoulder 27 that seats against the forward edges of the wallsthat define the pocket that receives such a tooth.

In both the forms of protecting tooth 3 (Figures 1 to 5) and 3 (Figure 12) the rearwardly presented seating face or shoulder, being received by the .renewable lip 10, imparts rearward thrust to said lip, which is sustained by the undercut seat 11 of the lip.

I claim: v 1. A toothed excavating implement having upon its digging portion tooth-receiving pockets constructed of outer and inner walls, and partition walls spacing said outer and inner walls apart and uniting them into a trussed structure.

2. An excavating implement having its penetrating portion constructed with outer and inner walls extending from side'to side of the implement forming the outer. and inner confines of tooth pockets, and partition walls located at intervals between said outer and inner walls, integrally uniting the lips together and forming therewith a trussed structure.

3. In an excavating implement, a digging portion extending substantially straight from side toside of the implement, and comprising outer and inner walls extending in said direction, and transverse partition walls located at intervals between the walls first named and integrallyuniting same together in a trussed structure, while forming therewith pockets for the reception of teeth. i. In an excavating implement, a penetrating portion having pockets to receive teeth, said pockets having their inner and outer walls formed in common by continuous walls extending. from side to side of the implementiand having their sidewalls formed by partitioning members spacing the outer and inner walls apartfand integraliy uniting them to form a trussed structure.

5. In an excavating-implement, a penetrating portion constructed of outer and inner walls extending from side to side of the implement and having edges jointly defining the forward margin of the implement, and teeth confined between said walls and having shoulders abutting against said edges thereof. z

6. .In an excavating I ed digging portion constructed-of spaced outer and inner walls extending transversea ly of the implement; one of said walls being constructed with a replaceable lip.

7 In an excavating implement, a pocketed digging portion constructed of spaced outer and inner wallsextending transversely of the implement; one of said walls being constructed with a replaceable lip extending around the corners of the imple-- ment.

8. In an excavating implement, a pocketed digging portion constructed of spaced outer and inner walls extending transversely of the implement; one of said walls be-' ing constructed with a replaceableslip extending around the corners of the implement and up the sides thereof.

9. In an excavating implement, a pocketed digging portion constructed of spaced outer and inner walls extending transversely of the implement; one of said walls being-constructed with'a replaceable lip extending around the corners of the implement and seating rearwardly against the wall of which it forms a part through means of undercut faces 1' 10. In an excavating implement, a pocketed digging portion constructed of spaced outer and innerwalls extending transversely of the implement; one of said walls being constructed with a replaceable lip extending around the corners of the implement and up the sides thereof; said lip seating against the wall of which it forms a part as well asagains't the sides of the implement throughthe medium of undercut faces. i

implement, a pocketv 11. In a toothedexcavating implement, a

penetrating portion constructed of outer and inner spaced walls forming confines of tooth receivin having a renewab e lip portion seating rear- 'wardly against it; and said implement havsaid 11 10 teeth constructed with shoulders through which t-hey seat rearwardly. against 12. excavating implement having a pocketed penetrating portion constructed of outer and inner transverse walls and in- ,tervening partition walls spacing said transposed verse walls apart and forming therewith tooth receiving pockets; the outer wall being constructed. with a replaceable lip; and sad lip having'means for securing it in place, passing throu h the 1i and the opvening partition walls.

13. In an excavating implement, a pocketed penetrating gortion, and teeth adapted to pockets in sai portion, some of the teeth being constructed with enlargements through which theyseat rearwar'dly against the ends of the pockets that pockets; the outer wall transverse wal and t rough inter- 14. In a front for dippers and like excavating implements a penetrating portion constructed of spaced outer and inner walls extending sidewise of the implement, and a series of strutting members located between and uniting and forming with said outer and inner walls a truss in the structure of said penetrating portion.

15. In a front for dlppers and like excavatin implements, inner and outer walls exten ing sidewise of the implement, adjacent the penetrating portion-of the implement, and a series 'of struttin members extending longitudinally of the 1m lement, one. of said walls from t e other and unitlng with said walls to forma truss.

16. In a front for dippers and like excavating implements, inner and outer walls extending sldewise of the implement, adjacent the penetrating portion of the im-' plement, a series of strutting members extending longitudinally of the implement, ofl'settin one of said walls from the other and uniting with'said walls to form a truss, and bracing'webs in line with strutting walls, in rear of the offset wall.

Signed at. Chicago I-Igts, Illinois, this 13th day of June, 1924.

JOHN oFALLoN CLARK. 

